(of an event) important, momentous.

A tendency to regard the epoch in which one lives as superior to others.

(medicine) An intensive chemotherapy regimen for treating aggressive non-Hodgkin lymphoma, consisting of etoposide, prednisolone, Oncovin (vincristine), cyclophosphamide, and hydroxydaunorubicin.

Constituting an epoch; opening a new era; introducing new conceptions or a new method in the treatment of a subject; highly novel and influential.

(physics, cosmology) The period immediately after the Big Bang, typically viewed at around one Planck time, whereby all forces were unified.

The second of the three Martian geologic epochs, approximately from 3,500 million years ago to 1,800 million years ago, marked by lava flows, preceded by the Noachian epoch, and followed by the Amazonian epoch.

The earliest of the Martian geologic epochs, approximately from 3,800 million years ago to 3,500 million years ago, marked by many large impact craters and followed by the Hesperian epoch.

The most recent of the Martian geologic epochs, from approximately 1.8 billion (1800 million) years ago (the end of the Hesperian epoch) to the present.

(geology) The closing subdivision of the Hamilton period in the American Devonian system; so called because the formations of this period crop out in Genesee, New York.

(cosmology, astrobiology, astronomy) An era of a Big Bang based universe with the physical laws of our Universe, where the cosmic microwave background is energetic enough to heat water into a liquid state, making all bodies beyond the inner limit of the habitable zone possible in hosting liquid water regardless of the amount of insolation provided by the local star.